/*
 * Copyright 2002-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.transaction.jta;

import org.springframework.util.Assert;

import javax.transaction.*;

/**
 * Adapter for a JTA UserTransaction handle, taking a JTA
 * {@link javax.transaction.TransactionManager} reference and creating
 * a JTA {@link javax.transaction.UserTransaction} handle for it.
 *
 * <p>The JTA UserTransaction interface is an exact subset of the JTA
 * TransactionManager interface. Unfortunately, it does not serve as
 * super-interface of TransactionManager, though, which requires an
 * adapter such as this class to be used when intending to talk to
 * a TransactionManager handle through the UserTransaction interface.
 *
 * <p>Used internally by Spring's {@link JtaTransactionManager} for certain
 * scenarios. Not intended for direct use in application code.
 *
 * @author Juergen Hoeller
 * @since 1.1.5
 */
public class UserTransactionAdapter implements UserTransaction {

    private final TransactionManager transactionManager;


    /**
     * Create a new UserTransactionAdapter for the given TransactionManager.
     *
     * @param transactionManager the JTA TransactionManager to wrap
     */
    public UserTransactionAdapter(TransactionManager transactionManager) {
        Assert.notNull(transactionManager, "TransactionManager must not be null");
        this.transactionManager = transactionManager;
    }

    /**
     * Return the JTA TransactionManager that this adapter delegates to.
     */
    public final TransactionManager getTransactionManager() {
        return this.transactionManager;
    }


    @Override
    public void setTransactionTimeout(int timeout) throws SystemException {
        this.transactionManager.setTransactionTimeout(timeout);
    }

    @Override
    public void begin() throws NotSupportedException, SystemException {
        this.transactionManager.begin();
    }

    @Override
    public void commit()
            throws RollbackException, HeuristicMixedException, HeuristicRollbackException,
            SecurityException, SystemException {
        this.transactionManager.commit();
    }

    @Override
    public void rollback() throws SecurityException, SystemException {
        this.transactionManager.rollback();
    }

    @Override
    public void setRollbackOnly() throws SystemException {
        this.transactionManager.setRollbackOnly();
    }

    @Override
    public int getStatus() throws SystemException {
        return this.transactionManager.getStatus();
    }

}
